It was made as a composite with the individual images as layers arranged in Photoshop.
I used a Canon 600D with a Soviet era mirror lens (MTO 500/8) handheld with 5 stacked filters ND1000 + (2x) ND8 + ND128 + UV
Settings were, ISO100, ss 1/1000, the lens is a fixed f8 and I used zoomed in live...